//写cookies
export function setCookie(name, value) {
  var Days = 30;
  var exp = new Date();
  exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
  document.cookie = name + '=' + escape(value) + ';expires=' + exp.toGMTString();
}

//读取cookies
export function getCookie(name) {
  var arr, reg = new RegExp('(^| )' + name + '=([^;]*)(;|$)');

  if (arr = document.cookie.match(reg))

    return unescape(arr[2]);
  else
    return null;
}

//删除cookies
export function delCookie(name) {
  var exp = new Date();
  exp.setTime(exp.getTime() - 1);
  var cval = getCookie(name);
  if (cval != null)
    document.cookie = name + '=' + cval + ';expires=' + exp.toGMTString();
}
